/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Array of points

*

*/

#ifndef _POINTARRAY_H_

#define _POINTARRAY_H_

#include <e32std.h>

namespace RT_GestureHelper

{

/** 

 * Represents a single point given at certain time

 */

struct TPointEntry 

    {

    /** constructor */

    inline TPointEntry( const TPoint& aPos, const TTime& aTime ) 

            : iPos( aPos ), iTime( aTime )

        {

        }

    TPoint iPos;

    TTime iTime;

    };

/**

 * Array of points that wraps another point array

 * The purpose of this class is to allow deriving classes to override []

 * and in that member function adjust the point, e.g., by setting one

 * axis to always a constant value. This allows providing a sequence of

 * points to the recogniser in which the other axis is ignored.

 */

NONSHARABLE_CLASS( TPointArray )

    {

public:

    /** 

     * @param aPoints points array to wrap (and filter)

     */

    TPointArray( const RArray< TPointEntry >& aPoints ); 

    /** @returns length of the array */

    TInt Count() const;

    /** 

     * @returns a filtered point at aIndex. Default implementation same

     *          as Raw(...)

     * virtual so deriving classes can modify the point (e.g., filter one axis)

     */

    virtual TPoint operator[]( TInt aIndex ) const;

    /** @returns an raw, non-filtered point at aIndex */

    TPoint Raw( TInt aIndex ) const;

private:

    const RArray< TPointEntry >& iPoints;

    };

} // namespace GestureHelper

#endif // _POINTARRAY_H_